Arthritis Drugs Flashcards

1
Q

Name three NSAIDs

A

Aspirin

Ibuprofen

Diclofenac

Meloxicam

Indomethacin

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2
Q

What are the main actions of NSAIDs?

A

Antipyretic -inhibit actions of PGs on hypothalamus

Analgesic -reduce sensitivity of neurones to bradykinin. Effective against pain of muscular/skeletal origin

Anti-inflammatory -reduce vasodilation and permeability of venules

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3
Q

What are the complications associated with NSAIDs?

A

Risk of gastric ulcers

Impaired coagulation

Risk of CV events in patients with cardiac disease or hypertension

May induce asthma attack, angioedema, urticaria (skin rash) or rhinitis

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4
Q

What is the main cause of the side effects associated with NSAIDs?

A

The inhibition of the COX1 enzyme as well as COX2, which produces prostaglandins involved in many beneficial processes such as the production of GI mucus and platelet aggregation

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5
Q

Which NSAID has some COX2 selectivity and therefore has the least GI effects?

A

Meloxicam

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6
Q

Name the two most common COX2 inhibitors

Which patient group are these given to?

A

Celecoxib

Etoricoxib

Used mainly in patients at high risk of serious GI side effects but with little CV risk

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7
Q

Why is misoprostol given alongside NSAIDs?

A

It is a synthetic prostaglandin which inhibits gastric acid secretion and may stimulate increased mucus production, so it preserves the mucus lining and protects agains ulceration

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8
Q

How does aspirin interact with warfarin?

A

By displacing warfarin bound to plasma proteins (therefore activating it) which increases plasma warfarin and potentiates warfarin’ anticoagulant activity

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9
Q

Paracetamol is analgesic and antipyretic, why is it not classed as a NSAID?

A

It has no anti-inflammatory effect

It does not inhibit COX1 or COX2

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10
Q

What are the most commonly prescribed drugs for arthritis?

A

Non-steroidal anti-inflammatory drugs

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11
Q

In addition to medication, what treatments are used for osteoarthritis?

A

Exercise

Weight loss

Thermotherapy

Joint supports

Suitable footwear and pacing

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12
Q

Which drugs are used to treat osteoarthritis?

A

Paracetamol (possibly with an oral NSAID and proton pump inhibitor)

Topical NSAIDs or capsaicin

Opioid analgesic

Intra-articular corticosteroid injection

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13
Q

What treatments are used for rheumatoid arthritis?

A

NSAIDs /opioid analgesics

Glucocorticoids

Immunosuppressants

Disease modifying antirheumatic drugs

Anticytokines

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14
Q

In addition to drug therapy, how is rheumatoid arthritis managed?

A

Diet and complementary therapy (physiotherapy, occupational therapy)

Referral for surgery

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15
Q

When are glucocorticoids used in rheumatoid arthritis?

A

Short-term to mange flare-ups in patients with recent-onset or established disease

Long-term if other treatment options have failed

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16
Q

How are cortisone or hydrocortisone steroids administered and what is their duration of action?

A

Twice daily cream or intra-articular injection

Short acting (1-12 hours)

17
Q

How is prednisolone administered and what is its duration of action?

A

Daily oral or intra-articular injection

Intermediate acting (12-36 hours)

18
Q

How is dexamethasone administered and what is its duration of action?

A

Intra-articular injection every 3-21 days

Long acting (36-55 hours)

19
Q

What are the actions of glucocorticoids that make them a suitable treatment for rheumatoid arthritis?

A

Anti-inflammatory and immunosuppressant actions:

Decrease transcription of pro-inflammatory cytokines

Decrease circulating lymphocytes

Inhibit phospholipase A2, which decreases the release of arachidonic acid

Increases synthesis of anti-inflammatory proteins

20
Q

Which glucocorticoids are used to treat arthritis?

A

Beclomethasone

Budesonide

Prednisolone

21
Q

What are the side-effects of oral corticosteroids?

A

Buffalo hump

Moon face

Hypertension

Increased abdominal fat

Thinning of skin

Increased risk of infection

Poor wound healing

Osteoporosis

Muscle wasting

22
Q

Name the four main types of disease modifying antirheumatoid drugs

A

Sulfasalazine

Gold compounds

Penicillamine

Immunosuppressants

23
Q

What are the side effects associated with ciclosporin?

A

Nephrotoxicity

Hepatotoxicity

Hypertension

Nausea and vomiting

Gum hypertrophy

GI problems

24
Q

What are the main immunosuppressants used to treat rheumatoid arthritis?

A

Methotrexate

Ciclosporin

Azathioprine

Methotrexate

Leflunomide

Cyclophosphamide (only when other therapies have failed)

25
Q

What is a common side effect of cyclophosphamide treatment and how can it be avoided?

A

Haemorrhagic cystitis

Prevented by administering large volumes of fluid